The classic 1980 Wimbledon Final between John McEnroe and Björn Borg has been dissected more than any match in tennis history. But the friendship that developed between the two, before and since, hasn't been as picked over, in part because Borg, who abruptly left the sport at age 26, has been generally averse to… »6/11/11 11:30am 6/11/11 11:30am